.btn {
    width: 60px;
    height: 30px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #fcfcfc;
    cursor: pointer;
}
.btn_add {
    width: 80px;
    height: 30px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #1890FF;
    cursor: pointer;
    color: #fcfcfc;
}
.main {
    background-color: #1890FF;
    color: #fcfcfc;
}